HTMLMediaElement: preservesPitch property

The HTMLMediaElement.preservesPitch property determines whether or not the browser should adjust the pitch of the audio to compensate for changes to the playback rate made by setting HTMLMediaElement.playbackRate.

Value

A boolean value defaulting to true.

Examples

Setting the preservesPitch property

In this example, we have an <audio> element, a range control that adjusts the playback rate, and a checkbox that sets preservesPitch.

Try playing the audio, then adjusting the playback rate, then enabling and disabling the checkbox.

<audio
  controls
  src="https://mdn.github.io/webaudio-examples/audio-basics/outfoxing.mp3"></audio>

<div>
  <label for="rate">Adjust playback rate:</label>
  <input id="rate" type="range" min="0.25" max="3" step="0.05" value="1" />
</div>

<div>
  <label for="pitch">Preserve pitch:</label>
  <input type="checkbox" id="pitch" name="pitch" checked />
</div>

const audio = document.querySelector("audio");
// When the audio starts playing...
audio.addEventListener(
  "play",
  () => {
    // Handle page visibility change:
    // - If the page is hidden, pause the video
    // - If the page is shown, play the video
    document.addEventListener("visibilitychange", () => {
      if (document.hidden) {
        audio.pause();
      } else {
        audio.play();
      }
    });
  },
  { once: true }
);

Specifications

Specification
HTML Standard
# dom-media-preservespitch-dev

Browser compatibility

BCD tables only load in the browser

See also